The current iOS Archdemon, how to best deal with this one?
Sorry not much time for the game these days, but perhaps it helps you for next time, when this one pops up.
The demon cannot be stunned and scattered. So you either go for a heavy heal team with not too much buffs. If you fail totally or lack heroes this can be an ok approach to do some damage at all. You wont get near any highscores....
The trick is to freeze and petrify him. While this is obviously in a way the same as stun, the demon is not immune to it.
The team used for this is Lava, Rascals, Medusa, Arctica and Sas. It takes some experimenting to do the drop right, but you can do the perma freeze and this allows you to use pd at his full potential (regen 8 / empower 7).
You will end in a dramatic suicide or if you get it right, kill the first one with ease. Doing considerable damage to the 2nd one is about luck, cause due to the small break inbetween your heros will be probably out of sync